business statistics

12. (a) A potential investor wants to purchase shares of stocks in one of the two companies A and B which show greater variability in prices. Following is the sample prices of the share of com. Company-A 15 20 50 40 60 Company-B 42 22 34 32 Which share does the investor buy and why. (b) Mean and standard deviation of 200 items are found to be 60 and 20. If at the time of calculation two items are wrongly taken as 3 and 67 instead of 13 and 17. Re-calculate mean and SD. 13.(a)Calculate Coefficient of Kurtosis and comment from the age of five labours : Age (in year): 25, 26, 29, 28, 27. (b)Calculate Coefficient of skewness from the following data and comments on the result Population in family 12 S WW No. of family un 2